Invention Grant
- Patent Title: Rare earth metal and metal oxide electrode interfacing of oxide memory element in resistive random access memory cell
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Application No.: US15505905Application Date: 2014-09-25
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Publication No.: US10388869B2Publication Date: 2019-08-20
- Inventor: Prashant Majhi , Elijah V. Karpov , Niloy Mukherjee , Ravi Pillarisetty , Uday Shah , Brian S. Doyle , Robert S. Chau
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Green, Howard, & Mughal LLP
- International Application: PCT/US2014/057470 WO 20140925
- International Announcement: WO2016/048327 WO 20160331
- Main IPC: H01L45/00
- IPC: H01L45/00

Abstract:
Thin film resistive memory material stacks including at least one of a high work function metal oxide at an interface of a first electrode and a thin film memory material, and a low work function rare earth metal at an interface of a second electrode and the thin film memory material. The high work function metal oxide provides a good Schottky barrier height relative to memory material for high on/off current ratio. Compatibility of the metal oxide with switching oxide reduces cycling loss of oxygen/vacancies for improved memory device durability. The low work function rare earth metal provides high oxygen solubility to enhance vacancy creation within the memory material in as-deposited state for low forming voltage requirements while providing an ohmic contact to the resistive memory material.
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